Commitments And Contingencies (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Undrawn capital and purchase commitments	$ 172.9		$ 185.6
Regulatory investigations fee	$ 6.0	$ 0.0